Legal Proceedings - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	0 Months Ended
Jul. 07, 2011
Commitments and Contingencies Disclosure [Line Items]
Reference to approximate value of previous judgment that plaintiff had against Grande	$ 60

Amount of judgment or settlement awarded to (against) the entity in respect of litigation.

No definition available.

Name:	us-gaap_LitigationSettlementAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration